Hey Tyler,
On page 1, you said you had a differential exchange program. Is that still available? I dont see it on your website. Do you offer the TruTrac as an option? I have an extra diff ready to send. I want all bearings replaced, TruTrac, and 3.91 or 4.10. Is that possible? Thanks!

We are working on getting a complete price system going for the core exchange. Please send an email to sales@jdpmotorsports.com with the options you would like, and we will get that pricing for you ASAP. Please let me know if you have any questions.

im almost ready to order too, are they in stock?, does any warranty be void if i change gears? as if i take the car to the dealer to tune the gears and will they void my warranty if i told them i have gears installed? and pricing for shipping to Puerto Rico.